Improvement in flues and setting of open boilers



A UNITED STATES PATENT OFFICE.

JOHN GHILOOTT, OF BROOKLYN, NEW YORK.

Specification forming part of Letters Patent No. 51,922,

dated January 9, 1866 antedated December 28, 1865.

To all whom it may concern:

Be it known that I, J oIIN Cnrnoor'r, ofthe city of Brooklyn, iu the county of Kings and State of New York, have invented a new and useful Improvement in the Flues and Settin g of Open Boilers, Melting Pans, or Kettles; and l do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, which form a part of this specification, in which` Figure l is a central vertical longitudinal section of an open boiler or melting-pan and its furnace, illustrating my invention. Fig. 2 is a vertical longitudinal section in a plane indicated by the line e z of Figs. 3 and 4. Fig. 3 is a transverse vertical section ot' the same in a plane indicated by the line x x of Figs. l and 2. Fig. 4 is a transverse Vertical section through the plane indicated by line w zo of Figs. l and 2.

Similar letters ot' reference indicate corresponding parts in the four gures.

yinveution consists in a novel arrangement of flues for the circulation of the heat generated by combustion in a fire-box or furnace under the bottom and around the sides of an open tank or pan used for melting or boiling purposes.

To enable others skilled in the art to make and apply my invention, I will proceed to describe it with reference to the drawings.

Over the re box or furnace A, of any known construction, is situated a double uejacket, B O, of cast-iron or fire-brick, within which is placed the pan or open boiler D. Between the outer shell, B, and theinner one, O, of the double jacket there is constructed a continuous system of iiues, c c 'b b, into which there is an inlet, a, at one end and one side of the pan, Figs. l, 2, and 4, for the entrance of the gaseous and volatile products of combustion from the furnace, and from which there is an outlet, d, Fig. 4, at the top, for the escape of the said products to the chimney or uptake. The flues e c are so constructed and arranged in the bottom of the jacket B O that the said gaseous and /volatile products will circulate back and forth several times under the bottom of the pan or boiler before passing into the iiues b b, which surround the jacket in several tiers in such manner that the said products of combustion circulate once around the jacket and pan in each tier, and through one tier after another several times around the jacket and pan before escaping to the chimney'or uptake at d.

The flues b b are horizontal on three sides of the jacket, but on the fourth side are inclined in such manner (shown in Fig. 4) as to convey the gaseous and volatile-products of combustion from one tier to the next above it, as indicated by the arrows in that figure.

The pan or boiler D may be of cast or wrought iron, or other metal, and of any desired form, the jacket being of corresponding form.

The heated gaseous and volatile products of combustion, circulating through the continuous system of flues several times back and forth underlthe bottom and around the sides of the jacket and pan, heat the contents of the pan very effectively, never burning the contents, as occurs in the heating or boiling of some substances when the bottom of the pan or boiler is exposed directlyto the fire, and by being kept for a long time in the flues yield up all their available heat to the pan but what is unavoidably lost by radiation from the outside of the jacket or from the outer wall of any' furnace, and no heat that could be utilized is permitted-to escape to the chim ney.

The/flue -jacket and pan, instead of being placed directly over the fireplace or furnace, might be arranged in any other position rela tively thereto, with a suitable communica tion from the tire-place or furnace to the opening a, Figs. 1,2,and 4. In some cases the jacket and pan may be heated by the waste heat from a furnace used for some other purpose.

I do not claim surrrounding a pan or open boiler with a continuous series of external flues in communication with a rectly on its bottom; but

What I claim as lmy invention, and desire to secure by Letters Patent, is

rlhe combination, for heating a melting pan, kettle, or open boiler, of a series of flues running back and forth under the bottom of the said pan, kettle, or boiler, and a series of ilues surrounding the same, the whole forming a continous system through which there is a circulation from the furnace or fire-place to the chimney or uptake, substantially as and for the purpose herein speciled.

tire acting di- Witnesses: JOHN OHILGOTT.

HIPPOLYTE MALI, J. W. GoMns. 

